I'm pretty sure this is legitimately a "the market will fix it" problem. If a manufacturer isn't able to efficiently use supply this will likely result in some spoilage and backlogging - that will lower the effective price that manufacturer will be willing to pay (since buying extra stock just to have it expire is a waste) and allow the more efficient manufacturers to continue to consume necessary supplies at an efficient rate. Additionally, any added sustainable demand will result in an increase in profitability in the supply chain before that point - so existing manufacturers will be encouraged to expand and some new manufacturers may enter the field.

We might see a short term dip but I don't think that additional inefficient factories would lead to less overall production unless there was something weird going on like government mandates to supply inefficient manufacturers.